Alaska Boring Logs & Geotechnical Data
6,274 public boring logs in Alaska; 5,979 with digitized SPT, soil or CPT data; 295 scanned log PDFs. Sources include Alaska Division of Geological & Geophysical Surveys, plus public reports found by web crawl. Free to search on the map, download or query by API.
Where the data comes from
Web-crawled reports in Alaska were published on, among others: dot.alaska.gov, dec.alaska.gov, dggs.alaska.gov, omb.alaska.gov, cookinlethousing.org, matsugov.us.
Counties with the most boring logs
| County | Boring logs | |
|---|---|---|
| Anchorage | 3,261 | view on map |
| Matanuska-Susitna | 2,128 | view on map |
| Kenai Peninsula | 309 | view on map |
| Yukon-Koyukuk | 161 | view on map |
| Northwest Arctic | 84 | view on map |
| Bethel | 77 | view on map |
| Nome | 47 | view on map |
| Fairbanks North Star | 36 | view on map |
| North Slope | 31 | view on map |
| Denali | 31 | view on map |
| Kodiak Island | 21 | view on map |
| Juneau | 20 | view on map |
What's in a boring log from Alaska
The 5,979 digitized borings carry the data engineers actually use: SPT blow counts (N-values) by depth, soil and rock descriptions, groundwater observations and, where the source ran cone penetration tests, CPT tip resistance and sleeve friction. A further 295 logs are scanned PDF reports — the original agency drawings — which you can open and download from the map. Holes are typically about 100 ft (31 m) deep; one in twenty goes past 306 ft (93 m). Not sure what a boring log looks like? See annotated example boring logs.
How to get this data
- Map — pan to a site, click a boring, and view the log, the original PDF, or an ML soil-profile prediction. No account needed.
- Downloads — every boring exports as PDF, DIGGS XML or AGS4; draw a polygon on the map for a multi-boring export or a site report.
- API — query borings by coordinates or bounding box, pull SPT/CPT/lab records, and generate site reports programmatically.
- Contribute — have Alaska boring logs that are not here yet? We take PDFs, DIGGS, AGS and spreadsheets.
This data was collected from public agencies and is republished as-is. It is a planning tool, not a substitute for a site investigation; see the terms and disclaimer. Counts refreshed 15 September 2026.
Other places
Florida (169,272)Washington (151,490)North Carolina (99,626)Ohio (78,298)Oregon (61,084)New Jersey (49,413) all regions →